Some of it was to make it easier to talk for people who didn't know the language of the country on the map, I heard that polish military maps of the UK apparent

Some of it was to make it easier to talk for people who didn't know the language of the country on the map, I heard that polish military maps of the UK apparently were "localized" the same way - and the persistent rumour is that under "take all of europe in counterstrike to prevent USA supplying the invasion" plan, Polish forces were to occupy major portions of UK.